package com.heihei.web.async;

import org.apache.commons.lang.RandomStringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.request.async.DeferredResult;

import java.util.concurrent.Callable;

/**
 *  用于测试异步调用
 *
 * @version 1.0
 * @since JDK1.8
 * @author duanhengfei
 * @date 2021年03月28日 11:08:28
 */
@RestController
@RequestMapping("/order")
public class AsyncController {
	
	@Autowired
	private MockQueue mockQueue;

	@Autowired
	private DeferredResultHolder deferredResultHolder;
	
	private Logger logger = LoggerFactory.getLogger(getClass());

	/**
	 *  callable 启动副线程，来处理具体业务
	 *
	 * @version 1.0
	 * @since JDK1.8
	 * @author duanhengfei
	 * @date 2021年03月28日 11:09:28
	 */
	@GetMapping("/callable")
	public Callable<String> orderCallable() throws Exception {
		logger.info("主线程开始");
		Callable<String> result = new Callable<String>() {
			@Override
			public String call() throws Exception {
				logger.info("副线程开始");
				Thread.sleep(1000);
				logger.info("副线程返回");
				return "success";
			}
		};
		logger.info("主线程返回");
		return result;
	}

	@RequestMapping("/deferred")
	public DeferredResult<String> order() throws Exception {
		logger.info("主线程开始");

		String orderNumber = RandomStringUtils.randomNumeric(8);
		mockQueue.setPlaceOrder(orderNumber);

		DeferredResult<String> result = new DeferredResult<>();
		deferredResultHolder.getMap().put(orderNumber, result);

		logger.info("主线程返回");
		return result;

	}

}
